Fix lint issues and regenerate CLI docs

- Rename pkg/llm types to drop LLM prefix (revive stutter: LLMConfig →
  Config, LLMOIDCConfig → OIDCConfig, etc.)
- Fix unused cmd parameter in config show RunE (revive)
- Use FormatJSON constant instead of raw "json" string (goconst)
- Fix gci import ordering in pkg/config/config.go
- Regenerate docs/cli/ for the new thv llm command group

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: taskbot

cmd/thv/app/llm.go

@@ -34,7 +34,7 @@ authentication transparently. Two modes are supported:
 Run "thv llm setup" to get started.`,
 	}
 
-	cmd.AddCommand(newLLMConfigCommand())
+	cmd.AddCommand(newConfigCommand())
 	cmd.AddCommand(newLLMSetupCommand())
 	cmd.AddCommand(newLLMTeardownCommand())
 	cmd.AddCommand(newLLMProxyCommand())
@@ -45,21 +45,21 @@ Run "thv llm setup" to get started.`,
 
 // ── config subcommand group ───────────────────────────────────────────────────
 
-func newLLMConfigCommand() *cobra.Command {
+func newConfigCommand() *cobra.Command {
 	cmd := &cobra.Command{
 		Use:   "config",
 		Short: "Manage LLM gateway configuration",
 		Long:  "The config command provides subcommands to manage LLM gateway connection settings.",
 	}
 
-	cmd.AddCommand(newLLMConfigSetCommand())
-	cmd.AddCommand(newLLMConfigShowCommand())
-	cmd.AddCommand(newLLMConfigResetCommand())
+	cmd.AddCommand(newConfigSetCommand())
+	cmd.AddCommand(newConfigShowCommand())
+	cmd.AddCommand(newConfigResetCommand())
 
 	return cmd
 }
 
-func newLLMConfigSetCommand() *cobra.Command {
+func newConfigSetCommand() *cobra.Command {
 	var (
 		gatewayURL   string
 		issuer       string
@@ -115,18 +115,18 @@ Example:
 	return cmd
 }
 
-func newLLMConfigShowCommand() *cobra.Command {
+func newConfigShowCommand() *cobra.Command {
 	var outputFormat string
 
 	cmd := &cobra.Command{
 		Use:   "show",
 		Short: "Display current LLM gateway configuration",
 		Args:  cobra.NoArgs,
-		RunE: func(cmd *cobra.Command, _ []string) error {
+		RunE: func(_ *cobra.Command, _ []string) error {
 			provider := config.NewDefaultProvider()
 			llmCfg := provider.GetConfig().LLM
 
-			if outputFormat == "json" {
+			if outputFormat == FormatJSON {
 				enc, err := json.MarshalIndent(llmCfg, "", "  ")
 				if err != nil {
 					return fmt.Errorf("failed to encode config as JSON: %w", err)
@@ -164,7 +164,7 @@ func newLLMConfigShowCommand() *cobra.Command {
 	return cmd
 }
 
-func newLLMConfigResetCommand() *cobra.Command {
+func newConfigResetCommand() *cobra.Command {
 	return &cobra.Command{
 		Use:   "reset",
 		Short: "Clear all LLM gateway configuration and cached tokens",
@@ -179,7 +179,7 @@ tokens from the secrets provider.`,
 			}
 
 			return config.UpdateConfig(func(c *config.Config) error {
-				c.LLM = llm.LLMConfig{}
+				c.LLM = llm.Config{}
 				return nil
 			})
 		},